Apparatus for casting metals.



J. D. CONEY. APPARATUS FOR CASTING METALS. APPLIOATION FILED JULY a1,una

Patented Mar. 3, 1914.

INVENTOR ATTORNEY 2 SHEETS-sum1,

J. D. GONEY.

APPARATUS FOR CASTING METALS.

APPLIOATION FILED JULY s1, 191s.

Patented ai'. 3, 19M

ENTOR s E s A s E N n W ATTORNEY y entren STATES PATENT oFFroE.

JESSEDAVID CONEY 0F WILLIAMSPORT, PENNSYLVANIA.

APPARATUS FOR CASTING METALS.

i ,osaaea casting The object of thc present invention is to improve theconstruction of metal Casting apparatus, and to provide a simple, inexfpensive and eiiicient apparatus of this character of strong and durableconstruction designed for casting inlays, bridges, crowns,

platesl and other structures used in dentistry,` and capable ot' read)yadjustn'ient to'enablev it. to be coupled to the shaft of an ordinarydental electric motor, and'adapted to utilize a rotary air compressor orpump for supplying' air to a blovv pipe for melting the metal to lillthe mold and also 'lor sucking the molten metal into the mold.

further object of the invention is to equip the apparatus with means fortrapping' any metal, which may be drawn from the investment into thesuction pipe connection and to arrange the trap at a point bcyoud andsome distance from'the investment holder in order to chill such metaland eft'ectually prevent the same from reaching the valve forcontrolling'the suction, and also to enable a Bunscn burner to be placedbeneath the investment holder tno maintain' the Inetal at a uniformtemperature while the cast is being made.

Vv'ith these and other objects in view, the invention consists in theconstruction and novel combination ot' i arts hereinafter fullydescribed, illustrated in the accompanyingr drawings, and pointed outinl the claims `frontltelcvation of the same. `Fig- 3 is a plan view.Fig. l isa detail elevation partly in `section, illustrating themanner'of ad- `j.ustably sup orting thel rotaryy air co1n' presser or pvp.. Fig. his a horizontal sec- Specicaton of Letters Patent.

Application led July 31, 1913.

Patented Mar. 3, 1914.

serial No. 782,329.

tional View of the same. Fig'. G" is a vertical sectional View on theline (3-6 of Fig. 5. Fig. 7 isa detail sectional view, takenlongitudinally through one of the arms of the suction pipe connection.Fig. S is a detail sectional view, illustrating the means for varyingthe supply of air delivered to the blo\v pipe. Fig. 9 is a plan viewpartly in section, showing another form of invention in which thesuction pipe is provided' with a single arm and investment. holder.

Like numerals of `reference designate corresponding' parts in all thefigures of the drawings.

In the accoml'ianying drau'ingrsV in which is illustrated the preferredembodiment. of the invention, l designates a base designed to beconstructed of any suitable material and provided at the back withspaced vertical rods 2 and 3, rigidly secured at their loiver ends` tothe base and forming a stand tor supportingy a vertically adjustablerotary air compressor or pump 4t, provided at opposit'e sides of itsshell or casing 5 With projccting lugs 6 having vertical openings 7through which the rods 2 and 3 pass. rIlle rotaryY air compressor orpump is adapted to be adjusted vertically to enable its shaft S to becoupled to the shaft 9 of an electrical dental motor 10, and it issecured in its'adjustment by set screws 11, mounted in threadedperforations of the lugs and engaging` the vertical supporting rods 2and 3 and clampingl the rotary compressor or pump to the saine. Theshaft 8 of the .rotary air compressor or pump is disposed horizontallyand is provided with a suitable coupling member l2 to enable it to bedetachably connected to the motor shaft 9, but the rotary pump orcompressor may be coupled to and operated by a dental lathe or any othersuitable driving or actuatingT device.

The shell or casing. of the rotary air compressor or pump is tapered'forwardly and is provided at its front vvall, which is integral withthe shell, with air inlet' and outlet openingsl and la. The rear wall ofthe shell consists of a removable plate .l5 detachably scoured. to theside Walls ot' the shell. The shaft 8, which is journaled in lsuitablebearings of the front and reary walls of the shell, carries a forwardlytapered head 16 circular. in cross section, as clearly shown in Fig. r6'and` mounted eccentrically within the shell creasing 5. The rotary,head 16 carries apluralty O radially arranged tapered piston platesforced outwerdiy by coiied spi'ings 19:, which maintain the biedes incomme with. the inner peripherei .sie Waiis of the shei or cesing. The'foison plates or blades i? eien. the entire iengeh of the siieil oreasing oni the. ion, iso the reef Waiis thereof emi in iie rotarymovement of the eii'cnie head enteing the. inie port oi' opening i3forced thongh `iie initie*u port or opening in the usuel manner, ishete-pefed Simp-e the sireii oi' easingend the rotary head ef eiteting atight and piopei coment of flee piston piees or biecies with the sheiioi eesing an@ en effective disehei'ge oi@ eii from the pwjip oreompi'essei. y

No claim is mede in'iie present eppiiczitien to the peiicuiaieonsrnetion of iotery air compressor. l

Exteniig from the outiet pob is e iov: nipe connection 2Q to which ebien? pipe {n.ob shown) o the 'esnei eonsteuotion is oonneeed by eflexible tube 2l, or any other suitable ineens. The 'blow pipeconnection 520, which is preefeiiy tapped into the ai? outiet poet oropening, is pfevide with e iateral disohaige opening 29;, adapted to beeoezed en uncovered oy e siioebie sleeve 23, which is 'proviesi with einopen ing 2e. The sieeve 23, which is prefeieeiy provided et the outer enwith en opeieiing iange 25, is gnide on the pig e eenneeien Q and isiieic against 'ocmy movement thereon by a key 25, sniteiiiy fixe. te thepipe connection and engaging inteeioi 'iongitmiinei groove of "thesieeve. When the sleeve is et "the iniit'. o iis inwe movement, theieteife isciiafge opening Q2 is eoveieei by tne sieeig'e Q3, which ieedepie to ne moved eucwaiiy to ceiry ie opening 52e into :egisteiu witheine opening whim wiii peel-siii :i ilortion of eine compressed ai? ieeseepe from pige connection 20 Wiehout enteeing the blow pipe, thei'ebyreducing ehe-amount ei ai? imesinfT iiiongii the A sneiion pipeconnection 2? is Connected Wiii iie sheii or easing ainsi extenns eoiniie ild iniet pori; oi' opening i3 thereof, en ie is equipped with aebree-*wey feine 28 oi ordinary construction, i'acinpefi 'to open andclose the passage 'iirongh the suction .pipe eon'neeion emi aise toConnect the in ner portion thereof with the' ntmospiieie through aiateiei or opening 30, The

three-Wav waive enables die air en'erin the rotary air compressor orpump to ee cii'awn eiiiei' ein'ough the ieerei ,outlet 50, er ilhengiione or more er1/ns 3l ceri-ying invesemen heifiei'e so mi the suctionthrough the pipe eonneetion 27' may be ntiiizefi for chewing into emairie; oi zio-.oki5l as the sucxion pipe 21",

iieieinmei' niiy expiained. Tiieemns Si, Whieii extend in oppositefiireetione fiom orrbiades l?? mounted in snitand 3T.

snoeien pipe eenneejon b meme? eine vmixes 5oz dosing the passagesthrough the arms and so for enabiin-g he air o bediavvn 'i'irongiieitiie of the eims. Each of' ne .firms 31 is equipped with anim'esmentiioidei bui any nnmoei' of such .ems and investment beider may,of Conse, be einpioj/edf oi" a single arm 3E- may be einpioyeii, asiiust'feeei in Fig, 9 ei" the drawinge. /Viien singie afm is employed,it prefeiebiy extend-s outwafiiy or forwerdiy end orins e eoninimiion ofthe suction pipe yConneetion.

Ai; the one encis of the arms 3l ae an ranged invesinen hoideizs 3L! and35 of cy iindiie i form and detuehaoiy mounted in eieiiy eup-siiepebaisee or members The invesmene holder 3i is of ehe other investmentgreeer diameter iien heiciei for use in connection Wih the ierger eiessof denfaei stuctmes, and it is preemoiy deaeiieeiy secured Within iieeupsimpeel bese ei' member 35 by threading she pets es indicated ai: 38in Fig. 2 of the drawings. The sineiier invesment beider 35 iLeeiieiabig tepeee ai the iowei portion et 3% to povifiea. tight fit,Each invesnient-iieifier is equipped with a suitable ieneie 4G to enebieit to ne eonvenieniy pvieeefi in en@ emoved iom its base or suppoiingmember. The base or Supporting meinem of eeen inesment hoidei ispreferably enierge et the bottom poi'tion and is provieie 'with e noieof passage 4l communie ting with tiie'ineiioi of eine cup and reeeimnine efijaeen'e en the erm or bi'eneii suchen pipe. connection.

ieeii e'fni o1" o'ioneii of the suction pipe is eqnippeei wiiii e tmpi9, Consising e e oepening veiioeiiy disposed 'nefiy igoion seenied etifs ep-per end to *ehe y a T-snped coupiing 4?), o? etiiei sniiaibiemeans, and imi'- i-s iowef end norme-iig; closed by three iefi e4,eiinpte-i io be ioediiy deieeiiefi 'io pemit any eenens of {iie tmp o neremoved itiiei'eioin. T -rep, *e bien is :idepeii oeficii any gow. ei'other ineni suoci Through investment, is emngeli beyond nnei sonriedistance from the veiicni pinne of the eeijsieen investment iioiciei tocanse any inoien meiai drawn ino #no ei'm or beeneh of iie sncion pipeeomiection io become eiiiiiefi before ienehing the tmp. so that it Wiiiposiiveiy drop into the same. iiso iocziting iie tmp ai :i point beyondtne invesmen iioider ampie spec-e is pmiieei beneeii @the saine ioadmit. of he we of e Bumsen burner foe heeing ihe @no shaped oase andiie investment beider Lo ineiniein die 'me-*bai ai a uniform temperaiieoixp-siiegiei bases $56 and 37 have *iweljyY @hin notoms und he burnerwi'ep'efi o ise iiiieetiy iieiiefiih the saine seeni'ee maximum heatingeiiwt. live heee e2 ne apparents is prefemiuiy Vthe matrix orinvestment.

oi. sumcient width to extend beneath the cupshaped members forsupporting a ,Bunsen burner.

ln the use of the casting apparatus a mold et was is first taken, forinstance, of a tooth to inlaid or filled. The wax is suspended l al ispoured around the wax pattern. .ie investment is allowed to set and isthoroughly dried and the wax pattern is melted and drawn from theinvestment 4or matrix leaving :in-'interior mold cavity. When it desiredto make a casting, the metal is placed in a downwardly tapered or othersuitable recess 4:5 formed in the top of the investment andcommunicating with the interior mold cavity by a narrow passagepreferably formed by a screw or other means for suspending the waxpattern in making The blow pipe is than employed to melt the metal, theair entering the rotary compressor or pum being drawn through thelateral inlet of the three-way valve. As soon as the metal is brought totlieproper molten condition, the valves are manipulated to cause asuction through me investment and the molten metal is drawn into themold cavity, making a casting which is a perfect reproduction of the waxpattern. After the casting is made, it is removed from the matrix orinvestment and finished in the usual manner.

'lihe apparatus is equipped with an adjustable drying pan 4:6 mounted onthe supporting rod il and secured to the same by a set screw 7., asclearly illustrated in Fig. 2 of the drawings. The rod 3 is preferablyextended above the rod 2 so that the drying pan, which is employed fordrying large investments and various other purposes, may

- be swung to either side of the apparatus.

l. il casting apparatus of the class described inchiding an aircompressor having an inlet openino', a suction pipe connection extendingfrom the air inlet opening, an investinent holder, means for connectingthe investment holder with the suction pipe connection, and a trap'depending from the suction pipe connection at a point beyond n eninvestment holder and investment mascribed including a stand, asupporting base, y

an air compressor' or pump having an inlet, a suction pipe connectionextending from the air inlet and having an arm located above the baseand provided with a valve7 an investment holder connected with the saidarm and provided with a base having a rela'- tively thin bottom andlocated above the stand and adapted to permit a heating device to beplaced directly beneath it, and a trap depending from the arm at a pointbeyond the Vertical plane of the investment holder so that any metaldrawn from the same will be chilled and solidified before reaching thetrap and positively caused to fall into the latter.

3. A casting apparatus of'the class de scribed comprising a stand havinga base, a rotary pump or compressor having air inlet and out-letopenings and adjustahly supported by the said stand, a suction pipeconnection extending from the air inlet opening and provided with athree-Way valve and having a plurality of arms or branches located abovethe said base, each of said arms or branches being provided with acontrolling valve, investment holders connected with and carried. by thesaid arms or branches and located beyond the valves thereof, and trapsdepending from the arms or branches and arranged at points between theinvestment holders and the valves of the said arms or branches.

ln testimony that I claim the foregoing my own, I have hereto affixed mysignature in the presence oi' two witnesses.

JESSE DAVID CONEY.

Witnesses:

FRANK W. HnivNiNGnn, ,CHARLES H. ELnoN.

